Cultivator



(No Model.)

B. P LYNCH.

GULTIVATOR. No; 378,141. 1 8 811888388. 21, 1888.

EDWARD P. LYNCH, OF DAVENPORT, IOXVA.

CULTIVATO R.

SPECIFICATION forming part of Letters Patent No. 378,141, dated February 21, 1888.

Application filed February :26, 1887. Renewed November 21, 1887. Serial No. 255,766. (No model.)

To all whom it may concern:

Be it known that I, EDWARD P. LYNCH, of Davenport, in the county of Scott and State of Iowa, have invented certain Improvements in Cultivators, of which the following is a specification.

This invention has reference to what are generally known in the art as parallel-motion cultivators, in which the shovel carrying standards are connected to the laterally-swinging beams or drag-bars through the medium of vertical pivots, and combined with controlling devices by which they are caused to face constantly in the same direction as they are moved laterally with the beam, as represented, for example, in Letters Patent of the United States No. 329,921, granted to me on the 10th day of November, 1885.

The aim of the present invention is to retain the so-called parallel movement of the shovels-that is to say, the constant angle of their faces with reference to the line of progression, as in the existing machines-and at the same time to provide for a convenient change in the width orspace between the two shovels carried :by one beam.

To this end it consists, essentially, in the combination, with the beam and the pivoted yoke or arm through which the standards are connected oTan adjustable connection by which the angle of said arm to the beam may be varied at will, and in other minor features hereinafter explained.

As the machine may be of ordinary construction in all other respects, I have deemed it snflicient to illustrate in the drawings one of the beams or drag-bars and the attendant parts to which my invention is confined,

In the accompanying drawings, Figure l is a top plan view of a drag-bar and its adjuncts having my improvement incorporated therein. Figs. 2 and 3 are similar views showing the same in modilied form. Fig. 4 is a longitudinal section on the line :0 r of Fig. 3. Fig. 5 is an end elevation of the parts shown in Figs. 3 and 4, the shovclstandard being removed.

In the accompanying drawings, A represents a dragbnr'or beam connected at its forward end by a vertical pivot, B, to a sleeve, 0, arranged to revolve around the horizontal axle I), or other suitable support, attached to or forming a part of the frame of the cultivator, in the ordinary manner. These details may be modified at will, the only requirement being that the rear end of the beam shall be free to swing vertically and laterally in the usual manner.

E represents a horizontal yoke or arm extending through or across the dragbar near its rear end. This yoke, to the ends of which the shovel-carrying standards G are pivoted,

is connected by a rod, H, lying parallel with the drag-bar, to the sleeve 0.

In their general construction and arrangement the above parts are similar to those in general use, the rod H,which swings laterally with the beam and remains at all times parallel therewith, serving to hold the yoke Bend the faces of the shovels at a constant angle to the line of progression as they are moved laterally with the beam.

In machines as heretofore constructed there was no provision for changing the distance between the two shovels, as is frequently demanded in the use of the machine. To this end I provide for changing at will the angle of the arm or yoke E to the line of travel, the effect of such change being to vary the dis tance between the paths followed by the two shovels.

In Fig. 1 I have shown a simple mode of thus adj Listing the rod H, consisting in dividing the same transversely and providing the adjacent ends with right and left hand threads and connecting them by a long nut, I, the rotation of which will serve to lengthen or shorten the rod. As the-rod is shortened, the angle of the arm E to the line of tr'avel'will be increased and the distance between the paths of the shovels diminished, and, on the contrary, as the rod is lengthened, the yoke E will be brought to a position more nearly at right angles with the line of travel and the distance between the paths of the two shovels increased.

In order that the faces of the shovels may be placed at the proper angle to the line of travel under different adjustments to the yoke E, I make the upper ends of the standards of a round form, seat them in grooves in the ends of the yoke E, and secure them by hook-bolts K, or equivalent fastening, as shown in Fig. 1. This construction permits the standards to IOC be turned aboutt hei vertical axesandsecured in difl'ere'nt positions. It preferred, however, the standards may be fixed rigidly to the ends of the yoke and the shovels made adjustable around their lower ends in either of the va rious modes now practiced in the art.

In Fig. 2 I have represented my invention embodied in another form. In this example the shovel-standards, instead of being attached to opposite ends of a single yoke or arm, are attached to two arms, E, connected to the beam by vertical pivots and extending in opposite directions therefrom at different points in its length. In this case the controlling-rod H, jointed at the forward end and lying parallel with the beam, as before, is connected to both arms, the effect being, as in the first example, to maintain a constant direction of the shovels as they move laterally with the beam. The variation in the length of the controllingrod will have the same effect in this form of the machine as in that first described. In this form of the device I show the divided connecting-rod, its two ends provided with a series of holes and connected by bolts a, so that it may be varied in length by changing the position of the bolts.

In Fig. 3 I have represented a construction similar to that in Fig. 1, except that the controlling-rod is made continuous and its rear. end provided with a series of holes, through either of which a vertical pivot connecting the rod with the yoke E may be inserted, thus changing the angle of the yoke in relation to the beam, the effect being precisely the same as in the preceding examples.

Figs. 8, 4, and 5 illustrate another mode of attaching the standards to the end of the yoke, in order that they may be turned horizontally to compensate for changes in its horizontal position. In this form the ends of the yoke are rounded to receive blocks K, in the outer faces of which the standardsare seated. The rounded end of the yoke is slotted horizont-ally, and a bolt, L, passes outward there- 5 through, through the bloekla, and through or past the standard into a bearing-block on its outer side, where a nut, M,is applied. The

bolt serves to bind the parts firmly together. 1

When loosened, it admits of the block being turned horizontally around the end of the yoke, in order to move the standard and bring the face of its shovel in the required position to the line of progression.

I am aware that a beam composed of two parallel members, each carrying ashovel, has i been providedwith a plate connecting said members at the rear end, said plate made ad-i justable in length to vary the distance between the rear ends of the two members and between the shovels carried by them, and this I do not claim. I

Having thus described my invention, what I claim isa 1. The laterally-swinging beain or drag-bar, a cross head or arm connected thereto by a vertical axis,two shovel-standards carried by said cross-head, and a longitudinally-adjustable connecting-rod, H, whereby the horizon-, 

